We developed a smartphone technology to sample people’s ongoing thoughts, feelings, and actions and found (i) that people are thinking about what is not happening almost as often as they are thinking about what is and (ii) found that doing so typically makes them unhappy.

Let me say that a different way: spending your life thinking about things that aren’t happening is making you unhappy. You would be happier if you focused on the here and now.

So much of the multi-tasking that we do is an attempt to switch between multiple things that aren’t happening, it’s a type of active mind-wandering. How many times do we check our social media to see if something is happening only to be reminded that nothing is happening. How many times have you refreshed your social media site only to refresh it again, and then again without even thinking. The research tells us that this is making us unhappy.